JPS56134833A - Direct current two-wire photoelectric switch for electromagnetic relay driving - Google Patents

Direct current two-wire photoelectric switch for electromagnetic relay driving

Info

Publication number
JPS56134833A
JPS56134833A JP3710980A JP3710980A JPS56134833A JP S56134833 A JPS56134833 A JP S56134833A JP 3710980 A JP3710980 A JP 3710980A JP 3710980 A JP3710980 A JP 3710980A JP S56134833 A JPS56134833 A JP S56134833A
Authority
JP
Japan
Prior art keywords
relay
transistor
turned
voltage
terminals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3710980A
Other languages
Japanese (ja)
Other versions
JPS5944808B2 (en
Inventor
Yasuyuki Watanabe
Hideaki Hachidan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP3710980A priority Critical patent/JPS5944808B2/en
Publication of JPS56134833A publication Critical patent/JPS56134833A/en
Publication of JPS5944808B2 publication Critical patent/JPS5944808B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
    • H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors

Abstract

PURPOSE:To start the operation of the electromagnetic relay surely, by connecting the connection point between the transistor and the constant-voltage element and the light projecting and receiving circuit side of the current limiting resistance by the output of the light projecting and receiving circuit. CONSTITUTION:When the output of light projecting and receiving circuit 10 becomes ''H'', transistor 20 is turned on in a short time. The circuit between terminals 22 and 23 is short-circuited completely through diode bridge 21 by the collector and the emitter of transistor 20 which is turned on, and the residual voltage between terminals 22 and 23 becomes 0V approximately. Therefore, all of the voltage of DC power source 4 is applied to relay 3, and relay 3 starts the operation surely. When transistor 20 is turned off, transistors 15 and 16 are turned on immediately, and voltages are generated in both ends of Zener diode 17, and the residual voltage is generated between terminals 22 and 23. Though the current is reduced due to this voltage, the current is sufficient for relay 3 to hold the operation, and relay 3 continues operating.
JP3710980A 1980-03-24 1980-03-24 DC 2-wire photoelectric switch for driving electromagnetic relays Expired JPS5944808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3710980A JPS5944808B2 (en) 1980-03-24 1980-03-24 DC 2-wire photoelectric switch for driving electromagnetic relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3710980A JPS5944808B2 (en) 1980-03-24 1980-03-24 DC 2-wire photoelectric switch for driving electromagnetic relays

Publications (2)

Publication Number Publication Date
JPS56134833A true JPS56134833A (en) 1981-10-21
JPS5944808B2 JPS5944808B2 (en) 1984-11-01

Family

ID=12488426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3710980A Expired JPS5944808B2 (en) 1980-03-24 1980-03-24 DC 2-wire photoelectric switch for driving electromagnetic relays

Country Status (1)

Country Link
JP (1) JPS5944808B2 (en)

Also Published As

Publication number Publication date
JPS5944808B2 (en) 1984-11-01

Similar Documents

Publication Publication Date Title
JPS6429018A (en) Input protection device for semiconductor circuit device
EP0651541A1 (en) Telephone subscriber circuit with galvanic isolating element for driving the on/off states of a telephone line
DE3779606D1 (en) Overload protection circuit for DC supplied device
JPS56134833A (en) Direct current two-wire photoelectric switch for electromagnetic relay driving
JPS57202118A (en) Chopper type mos comparator
GB2061033B (en) Electric lighting apparatus for a bicycle
JPS5714218A (en) Direct-current two-wire proximity switch
JPS5649691A (en) Current controlling circuit for dc motor
SU815788A1 (en) Timer
KR900000468Y1 (en) Polar testing and relaying circuit for power supply
JPS5757028A (en) Driving circuit
SU1188873A1 (en) Method of power transistor switch control
KR900007996Y1 (en) Switch over circuit for automatically controlling cooker
SU1191896A1 (en) Secondary electric power source providing d.c. or a.c. voltage
JPS5682920A (en) Electric equipment
SU845269A1 (en) Duty device
SU592002A1 (en) Semiconductor voltage regulator for electric dc generator
SU860037A1 (en) Stabilized dc voltage converter
SU904024A1 (en) Electromagnetic contactor control device
KR890003174Y1 (en) Turn-on circuit of power distribution unit
KR890002096Y1 (en) Power on-off arrangement
JPS6412775A (en) Power source switch circuit
KR920001210A (en) Die Lister (SCR)
KR880006818A (en) Floating Battery Power Supply
JPS56134834A (en) Alternating current two-wire photoelectric switch